# Crystal structure of 6-(4-chloro-phen-yl)-6a-nitro-6a,6b,8,9,10,12a-hexa-hydro-6,7-spiro[chromeno[3,4-]indolizine-12,11'-indeno-[1,2-]quinoxaline].
> クロメノインドリジン-インデノキノキサリンスピロ化合物の結晶構造解析


## Abstract

This study reports the crystallographic characterization of a spiro-fused polycyclic compound bearing a 4-chlorophenyl substituent and a nitro group. Two crystallographically independent molecules occupy the asymmetric unit. The pyran ring adopts an envelope conformation while the pyridine ring assumes a chair conformation in both molecules. The pyrrolidine and cyclopentene ring conformations differ between the two molecules. Intramolecular C-H···N hydrogen bonds are present in both molecules. Disorder is observed in the nitro group oxygen atoms of both molecules, and the chlorine atom in one molecule is also disordered over two positions with defined occupancy ratios. In the crystal lattice, intermolecular C-H···O hydrogen bonds generate chains along the [010] direction, and C-H···π interactions further consolidate a three-dimensional supramolecular network.

## Bibliographic

- **Authors**: Syed Abuthahir S, NizamMohideen M, Viswanathan V, Velmurugan D, Nagasivarao J
- **Journal**: Acta Crystallogr E Crystallogr Commun
- **Year**: 2019 (2019-02-01)
- **PMID**: [30800462](https://pubmed.ncbi.nlm.nih.gov/30800462/)
- **DOI**: [10.1107/S2056989019000975](https://doi.org/10.1107/S2056989019000975)
- **PMC**: [PMC6362633](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6362633/)
- **Study type**: other
- **Delivery route**: not specified
- **Effect reported**: not assessed

## Delivery context

The delivery route is not clearly identifiable from this paper. For hydrogen intake, inhalation is the most efficient route; inhalation, however, carries explosion risk (empirical LFL of 10%; high-concentration devices are not recommended).

## Safety notes

The delivery route is not clearly identifiable from this paper. For hydrogen intake, inhalation is the most efficient route; inhalation, however, carries explosion risk (empirical LFL of 10%; high-concentration devices are not recommended).

See also:
- [Inhalation concentration and LFL / UFL](https://h2-papers.org/en/safety-notes/inhalation-concentration)
- [Consumer Affairs Agency accident cases](https://h2-papers.org/en/safety-notes/accident-cases)

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> **Cite as**: H2 Papers — PMID 30800462. https://h2-papers.org/en/papers/30800462
> **Source**: PubMed PMID [30800462](https://pubmed.ncbi.nlm.nih.gov/30800462/)